Think about it?• Recite the text together.• Check the words.• look at the picture and answer the questions.•...
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集合集合的基本概念(1)•1集合的定义:由一些确定的、互异的对象构成的一个整体就叫做集合。简称集。•2元素:集合里的各个对象叫做这个...
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1.2应用举例第一课时问题提出t57301p21.正弦定理和余弦定理的基本公式是什么?2sinsinsinabcRABC===2222cosabcbcA=+-2222cos...
RevisionHowwasyourweekend?Whatdidyoudoovertheweekend?ItItwaswasprettygood/great/prettygood/great/good/OK/terrible…good/OK/terribl...
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